Contoso University EF

public class Instructor { public int ID { get; set; } [Required] [Display(Name = \"Last Name\")] [StringLength(50)] public string LastName { get; set; } [Required] [Column(\"FirstName\")] [Display(Name = \"First Name\")] [StringLength(50)] public string FirstMidName { get; set; } [DataType(DataType.Date)] [DisplayFormat(DataFormatString = \"{0:yyyy-MM-dd}\

public class Enrollment { public int EnrollmentID { get; set; } public int CourseID { get; set; } public int StudentID { get; set; } [DisplayFormat(NullDisplayText = \"No grade\

0..1 ~ *

public class Student { public int ID { get; set; } [Display(Name = \"姓\

public class OfficeAssignment { [Key] public int InstructorID { get; set; } [StringLength(50)] [Display(Name = \"Office Location\")] public string Location { get; set; } public Instructor Instructor { get; set; } }

0..1~1

public class Course { [DatabaseGenerated(DatabaseGeneratedOption.None)] [Display(Name = \"Number\

1 ~ *

public class CourseAssignment { public int InstructorID { get; set; } public int CourseID { get; set; } public Instructor Instructor { get; set; } public Course Course { get; set; } }

* ~ 1